Myntra.com — can not exchange product after redeeming insider points

Address: Gautam Buddh Nagar, Uttar Pradesh, 201301

I got my a pair of jeans today and mistakenly redeemed the insider points and now im not able to exchange that as size is a bit small for me. I dont want your insider points just want replacement for my product as fitting is the issue. Kindly make customer friendly policies.
This is the order id for your reference 111969721785762103103. Kindly do the needful asap.